cover -- 1d. on Nyasaland 4d. registered envelope endorsed "On Active Service" and cancelled by F.P.O. 1 c.d.s., addressed to Zomba with manuscript registration number, fine; also 1d. and 3d. tied by "FIELD POST OFFICE 7" c.d.s. on large part, battered cover to Zomba with number 9 arrival backstamp